Home / 12,120.40-18,181.51-6,278.07

Finding the Fourth Proportional to 12,120.40, 18,181.51 and 6,278.07

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Solution

The fourth proportional to 12,120.40, 18,181.51 and 6,278.07 is: 9,417.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,120.40 : 18,181.51 = 6,278.07 : x
  2. Step 2: Convert to fraction form
    12,120.40/18,181.51 = 6,278.07/x
  3. Step 3: Cross multiply
    12,120.40x = 18,181.51 × 6,278.07
  4. Step 4: Simplify right side
    12,120.40x = 114,144,792.49
  5. Step 5: Solve for x
    x = 114,144,792.49/12,120.40
  6. Step 6: Final answer
    x = 9,417.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.